Pump for vacuum-cleaners.



A. 0. GARMAN.

PUMP FOR VACUUM GLEANERS,

APPLIoATmN ULEB-11111.10, 1914.

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'ALvIN o. CARMAN, 0E TEKoNsHa, MICHIGAN.'

PUMP 130B VACUUM-CLEANERS.

nuages;

A 'Specicaton of Letters Patent. PatentedfDec. 1", 1914.

Original application filed July 2, 1913, Serial o. 777,131. i Divided and thsapplcaton filed anuary 10,

ToaZZ whom 'it may concern.' f l Be it known that I, ALVIN O. CARMAN, of Tekonsha, in the county of Calhoun and State of Michigan, have invented vcertain new and useful` Improvements inlumps for Vacuu1n-Cleaners; and I do hereby declare the following to be a full, clear, and exact description of the inventionjsuch as will enable others skilled in 'the art to which it appertains to make and use the same.

This invention relates to improvements in pumps and more particularly to such as are adaptable for use with vacuum cleaners, this application being avdivision of application filed by me on the 2nd day of July 1913, and designated by SerialNo.V 777,131.

The object of my present inventiongis to improve and simplify the pump construction of vacuum cleaners and to enhance the eiciency and ease of operation of the same.

iVith this and other objects in view, the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claims.

In the accompanying drawings; Figure 1 is a view of a hand-operated vacuum cleaner embodying my improvements, a portion of the dust receptacle being broken away; Figs. 2 and 3 are enlarged sectional views illustrating the suction devices, and Fig. t is a horizontal sectional view taken above the piston.

1 represents a cylinder provided at its ends with packing boxes 2 3 for the accommodation of the two pipes 4 5, said,l

pipes being connected with a piston 6 cated within the cylinder.

The piston 6 is made hollow and divided by a partition 7 into two chambers 8 9 with which the pipes 4 5 respectively communicate. rThe upper and lower walls of the chamber 8 are provided with ports 10 communicating with the interior of the cylinder and the upper and lower walls of the chamber 9 are likewise made with ports 11' which also communicate with the interior of the cylinder.

Located within the .chamber 8 are two hanger valves 12-12 for the ports 10, and these'valves are connected by a link 13 pivotally attached at its ends to the respective valves, said link being of such length that when one of said valves is closed, the other 1914,- semi No. 811,418.

and thus prevent possibility of faulty oper-v ation on .account of sticking of the valves.

The piston G is provided with a suitable peripheral packing 16 and in orderto pre vent the cylinder from rotary movement on the piston, a rod orbead 17 is provided Vwithin the cylinder to move in a groove 18 disposed transversely across the peripheral wall of the piston.

The upper end of the tubular rod or pipe 3 may be bentto form a handle 18av and a handle 19 .is secured, by means of arms 20, to the upper end of thecylinder, whereby the latter may be reciprocated on the two tubular rods or tubes 4 5 and cause a continuous flow of air upwardly through the same, by reason of the cooperation of said cylinderwith the valved piston with which the tubes communicate.

A flanged dis( 1 is rigidlysecured to the lower end ofthe lower tubular rod or tube 4, and receives the upper end of a conical disk receptacle 22, the latter being removably attached to said disk by means of spring jaws 23. rIhe lower end of the dust receptacle is provided with a short pipe section 211, which projects upwardly within said receptacle and to the depending end of this pipe section, the tubular shank 25 of an elongated nozzle 2G, is secured by clamping means such as indicated at 2.7. At respective ends of. the nozzle 26, two-wheeled trucks Q8 are located; each of said trucks comprising a bar 29 pivotally attached between its ends to an end oi' the nozzle and having rollers 30 mounted at its respective ends to run on the surface to be cleaned, the rollers being thus larranged in front and in rear of the nozzle and affording means to maintain the mouth in proper relation to the surface to be cleaned and at the same time permit the device as a whole to be rocked more or less during the operation of the same.

Within the dustreceptacle, a dust screen 31 is removably disposed and may consist of a conical cage of woven Wire covered with fabric, the lower portion of which latter projects upwardly through the bottom of the cage and receives the upperfend of the pipe section 24.

By moving the nozzle over the surface to be cleaned and atthe same time reciprocat ing the cylinder l on the valved piston 6, a continuous upward flow of air through the f tubes will be caused and the suction thus created at the mouth of the nozzle will cause dust, etc., to enter said nozzle and find its way to the dust chamber.

My improvements are simple in construction and may be operated effectually with limiting its scope and hence I do not wish to Copies of this patent may be obtained for restrict myself to the precise details herein set forth.

Having fully described my invention what I claim as new and desire to secure by LettersPatent, is

A portable pump for vacuum cleaners, comprising a cylinder, a hollow piston therein divided into two chambers, two pipes disposed in parallel planes and pass ing freely through the heads of the cylinder at opposite sides of the centers of the respective heads, said pipes secured to the hollow piston and communicating with the respective chambers thereof, two oppositely disposed valves for each of said chambers, links disposed in said chambers and connecting the valves of each pair and positively insuring the opening of one` valve of each pair when the other valve of the same pair. closes.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

ALVIN o. CARMAN.

Witnesses CHAS. H. Rouen, M. A. ESTES.

five cents each. oy addressing the Commissioner of Patents,

Washington. D. C. 

